diff --git a/board/funkey/busybox.config b/board/funkey/busybox.config
index 6c7db00..7a44334 100644
--- a/board/funkey/busybox.config
+++ b/board/funkey/busybox.config
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
 # Busybox version: 1.27.2
-# Sat Feb 24 11:11:49 2018
+# Tue Mar  6 00:09:21 2018
 #
 CONFIG_HAVE_DOT_CONFIG=y
 
@@ -529,9 +529,9 @@ CONFIG_VLOCK=y
 #
 # Linux Ext2 FS Progs
 #
-CONFIG_CHATTR=y
+# CONFIG_CHATTR is not set
 CONFIG_FSCK=y
-CONFIG_LSATTR=y
+# CONFIG_LSATTR is not set
 # CONFIG_TUNE2FS is not set
 
 #
@@ -571,13 +571,13 @@ CONFIG_DEFAULT_DEPMOD_FILE="modules.dep"
 # CONFIG_ACPID is not set
 # CONFIG_FEATURE_ACPID_COMPAT is not set
 # CONFIG_BLKDISCARD is not set
-CONFIG_BLKID=y
+# CONFIG_BLKID is not set
 # CONFIG_FEATURE_BLKID_TYPE is not set
 # CONFIG_BLOCKDEV is not set
 # CONFIG_CAL is not set
 CONFIG_CHRT=y
-CONFIG_DMESG=y
-CONFIG_FEATURE_DMESG_PRETTY=y
+# CONFIG_DMESG is not set
+# CONFIG_FEATURE_DMESG_PRETTY is not set
 CONFIG_EJECT=y
 # CONFIG_FEATURE_EJECT_SCSI is not set
 CONFIG_FALLOCATE=y
@@ -586,25 +586,25 @@ CONFIG_FBSET=y
 CONFIG_FEATURE_FBSET_FANCY=y
 CONFIG_FEATURE_FBSET_READMODE=y
 CONFIG_FDFORMAT=y
-CONFIG_FDISK=y
+# CONFIG_FDISK is not set
 # CONFIG_FDISK_SUPPORT_LARGE_DISKS is not set
-CONFIG_FEATURE_FDISK_WRITABLE=y
+# CONFIG_FEATURE_FDISK_WRITABLE is not set
 # CONFIG_FEATURE_AIX_LABEL is not set
 # CONFIG_FEATURE_SGI_LABEL is not set
 # CONFIG_FEATURE_SUN_LABEL is not set
 # CONFIG_FEATURE_OSF_LABEL is not set
-CONFIG_FEATURE_GPT_LABEL=y
-CONFIG_FEATURE_FDISK_ADVANCED=y
+# CONFIG_FEATURE_GPT_LABEL is not set
+# CONFIG_FEATURE_FDISK_ADVANCED is not set
 # CONFIG_FINDFS is not set
-CONFIG_FLOCK=y
+# CONFIG_FLOCK is not set
 CONFIG_FDFLUSH=y
 CONFIG_FREERAMDISK=y
 # CONFIG_FSCK_MINIX is not set
 CONFIG_FSFREEZE=y
-CONFIG_FSTRIM=y
+# CONFIG_FSTRIM is not set
 CONFIG_GETOPT=y
 CONFIG_FEATURE_GETOPT_LONG=y
-CONFIG_HEXDUMP=y
+# CONFIG_HEXDUMP is not set
 # CONFIG_FEATURE_HEXDUMP_REVERSE is not set
 # CONFIG_HD is not set
 CONFIG_XXD=y
@@ -627,14 +627,14 @@ CONFIG_FEATURE_MDEV_EXEC=y
 # CONFIG_FEATURE_MDEV_LOAD_FIRMWARE is not set
 CONFIG_MESG=y
 CONFIG_FEATURE_MESG_ENABLE_ONLY_GROUP=y
-CONFIG_MKE2FS=y
+# CONFIG_MKE2FS is not set
 # CONFIG_MKFS_EXT2 is not set
 # CONFIG_MKFS_MINIX is not set
 # CONFIG_FEATURE_MINIX2 is not set
 # CONFIG_MKFS_REISER is not set
 CONFIG_MKDOSFS=y
 # CONFIG_MKFS_VFAT is not set
-CONFIG_MKSWAP=y
+# CONFIG_MKSWAP is not set
 # CONFIG_FEATURE_MKSWAP_UUID is not set
 CONFIG_MORE=y
 CONFIG_MOUNT=y
@@ -653,8 +653,8 @@ CONFIG_MOUNTPOINT=y
 CONFIG_PIVOT_ROOT=y
 CONFIG_RDATE=y
 # CONFIG_RDEV is not set
-CONFIG_READPROFILE=y
-CONFIG_RENICE=y
+# CONFIG_READPROFILE is not set
+# CONFIG_RENICE is not set
 # CONFIG_REV is not set
 # CONFIG_RTCWAKE is not set
 # CONFIG_SCRIPT is not set
@@ -663,11 +663,11 @@ CONFIG_SETARCH=y
 CONFIG_LINUX32=y
 CONFIG_LINUX64=y
 CONFIG_SETPRIV=y
-CONFIG_SETSID=y
-CONFIG_SWAPON=y
+# CONFIG_SETSID is not set
+# CONFIG_SWAPON is not set
 # CONFIG_FEATURE_SWAPON_DISCARD is not set
 # CONFIG_FEATURE_SWAPON_PRI is not set
-CONFIG_SWAPOFF=y
+# CONFIG_SWAPOFF is not set
 CONFIG_SWITCH_ROOT=y
 # CONFIG_TASKSET is not set
 # CONFIG_FEATURE_TASKSET_FANCY is not set
@@ -683,18 +683,14 @@ CONFIG_FEATURE_UMOUNT_ALL=y
 CONFIG_FEATURE_MOUNT_LOOP=y
 CONFIG_FEATURE_MOUNT_LOOP_CREATE=y
 # CONFIG_FEATURE_MTAB_SUPPORT is not set
-CONFIG_VOLUMEID=y
-
-#
-# Filesystem/Volume identification
-#
+# CONFIG_VOLUMEID is not set
 # CONFIG_FEATURE_VOLUMEID_BCACHE is not set
 # CONFIG_FEATURE_VOLUMEID_BTRFS is not set
 # CONFIG_FEATURE_VOLUMEID_CRAMFS is not set
-CONFIG_FEATURE_VOLUMEID_EXFAT=y
-CONFIG_FEATURE_VOLUMEID_EXT=y
-CONFIG_FEATURE_VOLUMEID_F2FS=y
-CONFIG_FEATURE_VOLUMEID_FAT=y
+# CONFIG_FEATURE_VOLUMEID_EXFAT is not set
+# CONFIG_FEATURE_VOLUMEID_EXT is not set
+# CONFIG_FEATURE_VOLUMEID_F2FS is not set
+# CONFIG_FEATURE_VOLUMEID_FAT is not set
 # CONFIG_FEATURE_VOLUMEID_HFS is not set
 # CONFIG_FEATURE_VOLUMEID_ISO9660 is not set
 # CONFIG_FEATURE_VOLUMEID_JFS is not set
@@ -708,7 +704,7 @@ CONFIG_FEATURE_VOLUMEID_FAT=y
 # CONFIG_FEATURE_VOLUMEID_ROMFS is not set
 # CONFIG_FEATURE_VOLUMEID_SQUASHFS is not set
 # CONFIG_FEATURE_VOLUMEID_SYSV is not set
-CONFIG_FEATURE_VOLUMEID_UBIFS=y
+# CONFIG_FEATURE_VOLUMEID_UBIFS is not set
 # CONFIG_FEATURE_VOLUMEID_UDF is not set
 # CONFIG_FEATURE_VOLUMEID_XFS is not set
 
diff --git a/board/funkey/linux.config b/board/funkey/linux.config
index d68e49e..1a9f029 100644
--- a/board/funkey/linux.config
+++ b/board/funkey/linux.config
@@ -46,6 +46,8 @@ CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_MTD=y
 CONFIG_MTD_M25P80=y
 CONFIG_MTD_SPI_NOR=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_LOOP_MIN_COUNT=1
 CONFIG_SCSI=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_NETDEVICES=y
@@ -118,7 +120,9 @@ CONFIG_USB_MUSB_HDRC=y
 CONFIG_USB_MUSB_SUNXI=y
 CONFIG_NOP_USB_XCEIV=y
 CONFIG_USB_GADGET=y
-CONFIG_USB_CDC_COMPOSITE=y
+CONFIG_USB_MASS_STORAGE=m
+CONFIG_USB_G_SERIAL=m
+CONFIG_USB_G_ACM_MS=m
 CONFIG_MMC=y
 CONFIG_MMC_SUNXI=y
 CONFIG_NEW_LEDS=y
@@ -147,6 +151,7 @@ CONFIG_NVMEM_SUNXI_SID=y
 CONFIG_EXT4_FS=y
 CONFIG_VFAT_FS=y
 CONFIG_TMPFS=y
+CONFIG_CONFIGFS_FS=y
 # CONFIG_MISC_FILESYSTEMS is not set
 # CONFIG_NETWORK_FILESYSTEMS is not set
 CONFIG_NLS_CODEPAGE_437=y
diff --git a/board/funkey/rootfs-overlay/usr/sbin/share b/board/funkey/rootfs-overlay/usr/sbin/share
new file mode 100755
index 0000000..7e97bc5
--- /dev/null
+++ b/board/funkey/rootfs-overlay/usr/sbin/share
@@ -0,0 +1,115 @@
+#!/bin/sh
+
+#set -x
+
+THIS=$(basename $0)
+
+case "${1}" in
+    start)
+
+	if [ ! -f /mass_storage ]; then
+	    echo "$THIS: no shared storage file, create it" | tee /dev/kmsg
+	    dd if=/dev/zero of=/mass_storage bs=1M seek=1024 count=0 &&
+		cat <<EOF | sfdisk /mass_storage
+,,C
+EOF
+	    if [ $? -ne 0 ]; then
+		echo "$THIS: cannot create shared storage file" | tee /dev/kmsg
+		exit 1
+	    fi
+	    UNIT_LINE=$(fdisk -l /mass_storage | egrep Units)
+	    set $UNIT_LINE
+	    UNIT=${8}
+	    PART_LINE=$(fdisk -l /mass_storage | egrep /mass_storage1)
+	    set $PART_LINE
+	    let START="${2} * $UNIT"
+	    if [ x"$START" = x -o $START -eq 0 ]; then
+		echo "$THIS: cannot find shared storage file start" | tee /dev/kmsg
+		exit 2
+	    fi
+	    losetup -o$START /dev/loop0 /mass_storage &&
+		mkdosfs /dev/loop0 &&
+		losetup -d /dev/loop0
+	    if [ $? -ne 0 ]; then
+		echo "$THIS: cannot format shared storage file" | tee /dev/kmsg
+		exit 3
+	    fi
+	fi
+	lsmod | egrep -q ^g_mass_storage
+	if [ $? -eq 0 ]; then
+	    echo "$THIS; shared storage already started" | tee /dev/kmsg
+	    exit 4
+	fi
+	echo "$THIS: start shared storage" | tee /dev/kmsg
+	modprobe g_mass_storage file=/mass_storage
+	if [ $? -ne 0 ]; then
+	    echo "$THIS: cannot start shared storage" | tee /dev/kmsg
+	    exit 5
+	fi
+	echo "$THIS: shared storage started" | tee /dev/kmsg
+	;;
+    
+    stop)
+	echo "$THIS: stop shared storage" | tee /dev/kmsg
+	lsmod | egrep -q ^g_mass_storage
+	if [ $? -eq 0 ]; then
+	    modprobe -r g_mass_storage
+	    if [ $? -ne 0 ]; then
+		echo "$THIS: cannot stop shared storage" | tee /dev/kmsg
+		exit 6
+	    fi
+	else
+	    echo "$THIS: shared storage not started" | tee /dev/kmsg
+	    exit 7
+	fi
+	echo "$THIS: shared storage stopped" | tee /dev/kmsg
+	;;
+
+    mount)
+	if [ ! -f /mass_storage ]; then
+	    echo "$THIS: no shared storage file" | tee /dev/kmsg
+	    exit 8
+	fi
+	echo "$THIS: mounting shared storage" | tee /dev/kmsg
+	UNIT_LINE=$(fdisk -l /mass_storage | egrep Units)
+	set $UNIT_LINE
+	UNIT=${8}
+	PART_LINE=$(fdisk -l /mass_storage | egrep /mass_storage1)
+	set $PART_LINE
+	let START="${2} * $UNIT"
+	if [ x"$START" = x -o $START -eq 0 ]; then
+	    echo "$THIS: cannot find shared storage file start" | tee /dev/kmsg
+	    exit 9
+	fi
+	losetup -o$START /dev/loop0 /mass_storage &&
+	    mount -t vfat /dev/loop0 /mnt/
+	if [ $? -ne 0 ]; then
+	    echo "$THIS: cannot mount shared storage file" | tee /dev/kmsg
+	    exit 10
+	fi
+	echo "$THIS: shared storage mounted" | tee /dev/kmsg
+	;;
+
+    umount)
+	losetup -a | egrep -q /mass_storage
+	if [ $? -ne 0 ]; then
+	    echo "$THIS: no mounted shared storage file" | tee /dev/kmsg
+	    exit 11
+	fi
+	echo "unmounting shared storage"
+	umount /mnt &
+	losetup -d /dev/loop0
+	if [ $? -ne 0 ]; then
+	    echo "$THIS: cannot unmount shared storage" | tee /dev/kmsg
+	    exit 12
+	fi
+	echo "$THIS: shared storage unmounted" | tee //dev/kmsg
+	;;
+
+    *)
+	echo "Usage ${0} {start|stop|mount|umount}"
+	exit 13
+	;;
+esac
+
+
diff --git a/configs/funkey_defconfig b/configs/funkey_defconfig
index 934a62b..738f49a 100644
--- a/configs/funkey_defconfig
+++ b/configs/funkey_defconfig
@@ -49,6 +49,7 @@ BR2_PACKAGE_BUSYBOX_CONFIG="$(BR2_EXTERNAL_FUNKEY_PATH)/board/funkey/busybox.con
 
 # E2fsprog package for e2fsck and resize2fs
 BR2_PACKAGE_E2FSPROGS=y
+# BR2_PACKAGE_E2FSPROGS_FSCK is not set
 BR2_PACKAGE_E2FSPROGS_RESIZE2FS=y
 
 # SDL package for Retro games